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Çѱ¹Áö¹Ý°øÇÐȸ / v.13, no.5, 1997³â, pp.89-100
½Ç³»½ÃÇè ¹× ÇöÀå½ÃÇèÀ» ÅëÇÑ Áö¹ÝÀÇ ºñ¼±Çü º¯ÇüƯ¼º Æò°¡
( Evaluation of Nonlinear Deformational Characteristics of Soils from Laboratory and Field Tests )
±èµ¿¼ö;±Ç±âö; Á¤È¸¿ø, Çѱ¹°úÇбâ¼ú¿ø Åä¸ñ°øÇаú ºÎ±³¼ö, Associate Professor, Dept. of Civil Engineering, KAIST;Á¤È¸¿ø, Çѱ¹°úÇбâ¼ú¿ø Åä¸ñ°øÇаú ¹Ú»ç°úÁ¤, Ph. D Sudent, Dept. of Civil Engineering, KAIST, Á¤È¸¿ø, »ï¼º°Ç¼³ ¿¬±¸ºÎ¹® ¿¬±¸ÁÖÀÓ.;
 
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Åä¸ñ±¸Á¶¹°ÀÇ µ¿ÀûÇØ¼® »Ó¾Æ´Ï¶ó °ø¿ë»óÅ ±¸Á¶¹° ±âÃÊÀÇ º¯ÇüÇØ¼®À» À§Çؼ­´Â Áö¹ÝÀÇ ½Å·Ú¼º ÀÖ´Â ºñ¼±Çü º¯ÇüƯ¼º Æò°¡°¡ ¸Å¿ì Áß¿äÇÏ´Ù. º¯ÇüƯ¼º Æò°¡¸¦ À§ÇÑ ÇöÀå½ÃÇèÀ¸·Î´Â Àúº¯Çü·ü ÇÏ¿¡¼­ Áö¹ÝÀÇ Åº¼º°è¼ö¸¦ °áÁ¤ÇÒ ¼ö ÀÖ´Â Å©·Î½ºÈê½ÃÇèÀ̳ª Áß°£º¯Çü·ü ¿µ¿ª¿¡¼­ º¯Çü·ü Å©±â¿¡ µû¸¥ ź¼º°è¼ö °áÁ¤ÀÌ °¡´ÉÇÑ °ø³»ÀçÇϽÃÇèÀÌ »ç¿ëµÇ³ª Àü º¯Çü·ü ¿µ¿ª¿¡¼­ÀÇ Åº¼º°è¼ö º¯È­¸¦ ÃøÁ¤ÇÏÁö ¸øÇϰí,,ÇÏÁßÁ֯ļöÀÇ ¿µÇâ,±¸¼Ó¾ÐÀÇ ¿µÇâ µîÀ» ¾ö¹ÐÈ÷ Æò°¡ÇÏÁö ¸øÇÏ´Â ´ÜÁ¡ÀÌ ÀÖ´Ù. °øÁøÁÖ/ºñƳÀü´Ü½ÃÇè°ú °°Àº ½Ç³»½ÃÇè¿¡¼­´Â Àúº¯Çü·ü ¹× Áß°£º¯Çü·üÀ» Æ÷ÇÔÇÏ´Â Àüº¯Çü·ü ¿µ¿ª¿¡¼­ÀÇ Åº¼º°è¼ö ÃøÁ¤ÀÌ °¡´ÉÇϳª ºÒ±³¶õ½Ã·áÀÇ Ã¤Ãë¿Í ½Ã·áÀÇ ´ëÇ¥¼º È®º¸°¡ ¸Å¿ì ¾î·Á¿î ´ÜÁ¡ÀÌ ÀÖ´Ù. µû¶ó¼­ º¸´Ù ¾ö¹ÐÇÑ ÇöÀåÁö¹ÝÀÇ º¯Çü·ü Å©±â¿¡ µû¸¥ ź¼º°è¼ö °áÁ¤À» À§ÇÏ¿©´Â °¢°¢ÀÇ ½Ç³»½ÃÇè°ú ÇöÀå½ÃÇè¿¡¼­ÀÇ ½Å·Ú¼º ÀÖ´Â º¯Çü·ü ÃøÁ¤¹üÀ§, ÀÛ¿ëµÇ´Â ÀÀ·ÂÀÇ Å©±â, ½ÃÇèÀÌ ¼öÇàµÇ´Â ÇÏÁßÁ֯ļö Â÷ÀÌ µîÀ» È¿°úÀûÀ¸·Î °áÇÕÇÏ¿© »ç¿ëÇÏ¿©¾ß ÇÑ´Ù. º» ³í¹®¿¡¼­´Â Áö¹ÝÀÇ ºñ¼±Çü º¯ÇüƯ¼ºÀ» ÇöÀå ¹× ½Ç³»½ÃÇè °á°ú¸¦ È¿°úÀûÀ¸·Î °áÇÕÇÏ¿© »ç¿ëÇÏ´Â ¹æ¹ýÀ» Á¦½ÃÇϰí, È­°­Ç³È­Åä Áö¹Ý¿¡¼­ ÇöÀå½ÃÇèÀ¸·Î Å©·Î½ºÈê°ú °ø³»ÀçÇϽÃÇèÀ», ½Ç³»½ÃÇèÀ¸·Î´Â °øÁøÁÖ/ºñƳ Àü´Ü½ÃÇèÀ» ¼öÇàÇÏ¿© ÇöÀåÁö¹ÝÀÇ º¯ÇüƯ¼ºÀ» °áÁ¤Çϰí, °¢ ½ÃÇè¹ýµéÀÇ Àå.´ÜÁ¡°ú ½Å·Ú¼º ÀÖ´Â ½ÃÇè¹üÀ§¸¦ °ËÅäÇÏ¿´´Ù. ¸¶Áö¸·À¸·Î, ÇöÀåÁö¹ÝÀÇ ºñ¼±Çü º¯ÇüƯ¼º Æò°¡ ÀýÂ÷¸¦ Á¦½ÃÇÏ¿´´Ù.
It is very improtant to evaluate the reliable nonlinear deformational characteristics of soils not only in the analysis of geotechnical structures under working stress conditions but also for the soil dynamic problems. Field testings such as crosshole and pressuremeter tests can be used to determine the modulus of soils under in-situ conditions, but it is not possible to determine the modulus over the entire strain amplitude range. Laboratory methods such as resonant column 1 torsional shear test can be used to determine the modulus over the whole strain amplitude range, but it is very difficult to obtain the representative undisturbed samples on the sixte. For the reliable evaluation of nonlinear deformation characteristics of soils on a typical site, small strain modulus obtained from field testy and nomalized modulus reduction curve determined by laboratory bests need to be combined. In this paper, laboratory and Held testy were performed at a sixte which consisted of granite wearthered residual boils to evaluate the nonlinear deformational characteristics of coils such as the effects of strain amplitude, loading frequency, confining pressure and sample disturbance. It has been shorn that when the effects of these factors are properly taken into account, the stiffness values evaluated by various field and labrotary tests are comparable to each other fairly well. Finally, the procedure to evaluate the nonlinear deformstional characteristics of the sixte was proposed.
 
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Nonlinear deformational characteristics;Resonant column;Torsional shear;Crosshole;Pressuremeter;
 
Çѱ¹Áö¹Ý°øÇÐȸÁö:Áö¹Ý / v.13, no.5, 1997³â, pp.89-100
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-215X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199711920447651)
¾ð¾î : Çѱ¹¾î
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